Painttoad raises a good point - larger tower speakers often sound their best when they have some space between them and around them (ie not tucked tight into the corners of the room). A 10'x10' room would be a bit cramped - it would require some delibrate speaker selection and furniture placement. Staying with a 7.1 setup such as you have currently would get a bit cramped in such a small space, and if you set the couch on the back wall (as would tend to be the case with a large RPTV like yours), the surround back speakers would not blend as well as if there was more room for all four surrounds to work together. Also, I seem to recall hearing on a couple of occasions that perfectly square spaces are particularly problematic acoustically.